Dust separator



Nov. 4, 1930. s CHEW 1,780,641

DUST SEPARATOR Fild Aug. 17 192 Jamar/fit w parallel.

the curved passage.

Patented Nov. 4, 1930 UNITED STATES 'PATENTLOFFICE' SAMUEL NOEL CHEW, OF THORNTON HEATH, ENGLAND, ASSIGNOR TO PNEUMATIC CON VEYANCE & EXTRACTION (1929) LIMITED, OF LONDON, ENGLAND, A COMPANY OF GREAT BRITAIN nus'r SEPARA'IOR Application filed August 17, 1926, Serial No. 129,792, and in Great Britain August 19, 1925.

This invention relates to means for extracting dust and grit from air, flue gas or other medium, and more particularly to such means wherein the medium is caused 'to take a curved path so that the suspended matter, by reason of its greater weight is thrown by centrifugal force to the periphery of the curve.

The object of the invention is to provide improved and simplified construction of apparatus.

According to this invention the extractor comprises a closed casing, forming a collectg chamber for the dust and grit, an out! let at the bottom of thecasing and at least one part-circular V-shaped tube in said casing, open at its ends to the surface of the casing and having an outlet opening at its peripheral apex within the casing and inlet opening on its inner side within the casing near its inlet end.

The accompanying drawing illustrates several forms of the invention in which: Fig. 1 is a side elevation of an extractor with the front side removed.

Fig. 2 is a sectional elevation on' line 2, 2 Fig. 1,

Fig. 3 is a plan of a modification.

Fig. 4 is a plan of a further modification showing two curved elements arranged in As shown in Figs. 1 and 2, the-apparatus comprises a casing g in which are mounted two segmental conical discs 0', 0 arranged to form a circular V-shaped channel. A curved plate 0? extending for the full width of the casing g is provided, with the circle of the discs 0 completing the tubular formation of This plate 0 extends to the-top of the casing at one end, but at the other end is bent back to leave a gap or passage f. Slots edges of the plate 0 between the inner edges of the discs and the side of the casing. Outlet d is provided between the contacting edges of the conical discs, suitable guide plates or a chute 6 being arranged therein if desired. Suitably formed inlet and outlet connections a and b are provided having coupling flanges at each end, the section of the bore of such h, h are provided in the crossover pipes or connections preferably merging from the circular to the triangular and being curved and set angularly as shown'so that they are interchangeable and are directed past one another. The casing g is provided at its lower end with the usual inclined bottom, having a suitable outlet j for the accumulate dust or other matter.

In operation the dust is driven by centrifugal action to the'periphery of the curved V-shaped passage and passes out through the opening at the small quantity of air passing through with it returning slowly and almost dust free through the slots h and opening 7 to the V-shaped passage where it mingles with the incoming air and is again subjected to centrifugal action.

In the modification shown in Fig. 3, two sets of conicaldiscs 0 are employed forming passages which are connected in series by pipes 70 and provided with inlet and outlet connections is and In all of which are interchangeable and similar to those shown in ing through a suitable passage or opening with a small quantity of the medium which is subsequently returned at the inlet.

Where desirable the inlet can be made ta pered to speed up the gas or other medium in the curved passage, and the dust outlet from the passage may be in the form of a continuous slot, or a series of short slots or holes which may be made by drilling or punching.

In addition to the arrangements shown the cones may be placed at an angle and the ductsmodified so that the path. through the apparatus becomes a complete helix. 1 a i The construction has amongst other advantages arising .out of its improved construction, the feature that owing to the shape of the curved passage the outlet at the periphery may be comparatively small, and the flow of air through such passage may be relative ly small and slow.

What I claim is:

1. An extractor for extracting dust and grit from air or other medium comprising a closed casing forming a collecting chamber for the dust and grit, outlet means at the bottom of the chamber for the collected matter, and a part-circular tube Within said casing, for the passage of the medium, of V-shaped section with the apex of the section at its outer periphery, said tube being open at its ends to the outside of the casing for coupling pipes and having two openings within the casing, one an outlet at its peripheral apex and the other an inlet on its inner side near its inlet end, both openings communicating with the collecting chamber, as set forth.

2. An extractor. for extracting dust and grit from air or other [medium comprising a closed casing forming a collecting chamber for the dust and grit, outlet means at the bottom of the chamber for the collected matter, and a pair of segmental conical discs in the casing arranged to form the sides of a part circular tube of triangular section, for the passage of the medium, with the apex of its section at its outer periphery, a curved platelike member coacting with the inner edges of the discs to form the inner face of the said triangular tube, said tube being open'at its ends torthe outside of the casing for coupling pipes and having two openings within the casing, one an outlet at its peripheral apex between the two discs and the other an inlet,

on its inner side near its'inlet end formed by turning back the end of the curved plate, such curved plate havingopenings for the passage of, the medium from the collecting chamber to such inlet, as set forth.

In testimony whereof I have signed my name to this specification.

S. NOEL CHEW. 

